/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
Applies Vertex Blend Weight Painting according to the given parameters
static void ApplyVertexWeightPaint ( const [FMeshPaintParameters](API\Editor\MeshPaint\FMeshPaintParameters) & InParams, const [FLinearColor](API\Runtime\Core\Math\FLinearColor) & OldColor, const float PaintAmount, [FLinearColor](API\Runtime\Core\Math\FLinearColor) & NewColor )